1203135231 has 8 divisors (see below), whose sum is σ = 1604507904. Its totient is φ = 801926360.

The previous prime is 1203135223. The next prime is 1203135239. The reversal of 1203135231 is 1325313021.

It is an interprime number because it is at equal distance from previous prime (1203135223) and next prime (1203135239).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1203135231 - 2³ = 1203135223 is a prime.

It is a super-2 number, since 2×1203135231² = 2895068768146846722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1203135198 and 1203135207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203135239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22641 + ... + 54026.

It is an arithmetic number, because the mean of its divisors is an integer number (200563488).

Almost surely, 2^1203135231 is an apocalyptic number.

1203135231 is a deficient number, since it is larger than the sum of its proper divisors (401372673).

1203135231 is an equidigital number, since it uses as much as digits as its factorization.

1203135231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81901.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1203135231 is about 34686.2397933244. The cubic root of 1203135231 is about 1063.5832310551.

Adding to 1203135231 its reverse (1325313021), we get a palindrome (2528448252).

The spelling of 1203135231 in words is "one billion, two hundred three million, one hundred thirty-five thousand, two hundred thirty-one".